Cell Cycle and Cell Division — BIOLOGY STD 11 Science — Question

When oxygen in the atmosphere decreases by 50%, how will respiration in plants be affected?

If the father's blood type is A and the mother's blood type is also A, what will be the blood types of their offspring?

Name the contractile protein found in muscles.

Name (a) an aerobic and (b) an anaerobic nitrogen fixing bacterium.

Which structure replaces notochord in vertebrates?

What are the layers, constituting the bark?

Which of the words given for the following statements are the related words (i) Prophase,(ii) Metaphase,(iii) Anaphase,(iv) Telophase.
(a) Nuclear membrane reappears.
(b) Chromosomes are the thickest and smallest.
(c) Chromosomes start coiling.
(d) The chromosome divides into two at the centromere.
(e) Pre-stage of cytokinesis.
(f) Each chromosome is made up of two chromatids/ half chromosomes.

Pyruvic acid, the key end product of glycolysis has many metabolic fates. What does it form under aerobic condition?

Mention the modifications or structural features of ileum, which make it suitable for absorption of nutrients.

Meiosis occurs in plants and animal cells in similar location Identify.